A key account manager is in charge of the company’s most important accounts, ensuring that these relationships are strong -- that they are efficiently catering to their accounts’ needs and that all issues are addressed quickly and effectively. While key account managers may be responsible for a smaller number of accounts than a general account manager, the value of these key accounts can add up to a large portion of the company’s revenue. Thus, it’s crucial to demonstrate in your resume that you have the skills and experience to succeed in such an important role.